Machine for removing surplus material projecting beyond seams



A. LATHAM.

MACHINE FOB REMOVING SURPLUS MATERIAL PROJECTING BEYOND SEAMS.

APPLICATION FILED MAR. 28. I9I8.

Patented Oct. 21, 1919.

2 SHEETS-SHEET I.

P W w THE COLUMBIA PuNoqn/wu cc., WASHINGTON, u. C.

A. LATHAM.

MACHINE FOR REMOVING SURPLUS MATERIAL PROJECTING BEYOND SEAMS.

APPLICATION FILED MAR. 28. 1918. 1,319,293.

Patented Oct. 21, 191.9.

2 SHEETS-SHEET 2- 1-1 I cnuvmnm PLANOGRAPII cn., WASHINGTON, m c

' TE STATES PATENT orrioa.

ALBERT LATHAM, or nnvnnnzmassncnusnrrs, As'sicnoa To UNITED siIoE 'MAOHINERY CORPORATION, OF-EATERSON, NEW JERSEY, A cosronarron or NEW JERSEY.

'MACHINE FOR REMOVING SURPLUS MATERIADPROJECTTNG BEYOND SEAMS.

Specification ofLette'rs Patent.

PatentedOct. 21, 1919.

Application filed March 28, 1918. $eria1 No. 225,331.

for use in the manufacture of boots and shoes and is herein illustrated as embodied in a machine for removing surplus materlal projecting beyond the seam which joins the 7 quarters to the vamp of a shoe.

In the manufacture of shoes, there are several thicknesses ofmaterial at the point where the lower forward portions of the quarters are attached to the throat of the vamp. For example in a lace balmoral boot, there may be in addition to the quarters and the vamp, the linings of the quarter, the lacing trips, the lacing strip stays and certain other pieces of reinforcingmaterial. The stitches which attach the quarters to the vamp pass through all of these articles so that a considerable amount of surplus material projects beyond the seam. This material, if allowed to remain, forms an objectionable bunch which makes the shoe more orless unsightly and uncomfortable.

The general object of the present invention is to produce a compact, accurate and apid machine for accomplishing this operation. I According toone feature of. the invention a cylindrical cutter and a curved work support are employed. In the illustrative machine a comparatively small cutter is rotated at high speed, thematerial being sus tained on a work support the face of which is curved to correspond to the curvature of the edge of the cutter. This construction permits the use of a comparatively small, compact machine in which the knife edge moves at high speed so aste produce rapidly clean'cut. V I V 7 Another featureofthefmvention coniprises means for holdmg the material on the supp-ortduringtheeutting operation. Con

venie-ntly a yielding pressure such as a brush,

rial on a bevel so as 'fOIIIltLUOll of a ridge on the inside of the angle of the bevel. feature of the invention comprises, in amamovement of the barto the material to the shape of the faceof the 7 work support and thereby toinsure that the cuts shall be uniform.

It is desirable to sever the surplus mateto avoid the subsequent shoe, and to provide means for varying the chine of the class described, means for severmg the surplus materlal on a bevel and means forvarying the angle of thebevel;

is angularly adjustable,

Another feature-of-the In the illustrative machine the'work support invention relates to mproved means for causing and controlling the relative movement. of approach betweenthe cutter and the work support.

These and other featuresof the invention,

including certain details of construction and combinations of parts, will be described as embodied in an 7 illustrative machine and pointed out in the appended claims.

Referring to the accompanying drawings, Figure 1 1s aslde elevatlon of a machine To this end 5 another in which the present invention isembodied,

- the knife guard having been removed;

Fig.2 is a-perspective of the work support and its mounting;

Fig. 3 is a detail in cross-section showing a piece of work being operated upon;

Fig. 4 is a front elevation of the machine,

the work support having been removed;

Fig. '5 is a detail principally in section showing the friction plug for retarding the V which the work support i pivoted; f -Fig. 6 is a; longitudinal cross-section through the clutch me'chanism; v I r Fig. 7 is a transverse section through the clutch mechanism, and i r p :F'g. 8qis a detail, principally in section, .showing the connection between the work support raising bar and its operating mechanism.- l 1 I Mounted in suitable hearings in the frame 'of the? machine is a driving shaft. .9 having fast to one endthereofa pulley 11 to which .power may be appliedthrough abelt (not shown); This shaft carries a worm '13 which meshes with a =gear l5 (see Fig. .6)

loose upon a. counter-shaft '17 Tandfhaving 7 formed upon oneend thereof clutch teeth" 19. These teeth are adapted to engage similar teeth on the end of a clutch member 21 which is slidable longitudinally of the shaft 17 but is held from rotative movement with respect thereto by the key 23. The clutch member 21 is urged at all times into operative position by the action of a coiled spring which surrounds the stem of a plunger 27, said plunger being received in a bore in the end of the shaft 17 and being connected with the clutch member 21 by a pin 29 which passes through slots (not shown) in the shaft. A hand wheel 31 furnishes means for turning the shaft by hand when desired; and a button 33 similarly furnishes means for disconnecting the clutch. The clutch member 21 has formed thereon a cam 123 which is normally engaged by a pin 35 to hold the clutch member in inoperative position. A spring 37 urges the pin at all times into the path of the cam (to the left as viewed in Fig. 7). A treadle rod 39, when pulled down, turns a bell crank lever 11 having pivoted thereon a spring-controlled pawl 43 which engages a lug 135 on the pin 35 to pull out the pin so as to permit the spring 25 to throw in the clutch. The pawl 43, however, soon rides over the lug 135, whereupon the pin returns to the position shown so as to engage the cam 1'23 again and stop the shaft 17 after a single revolution. The details of the clutch mechanism will not be described further since they form per 86 no part of the present invention and any suitable one-revolution clutch may be used.

Mounted in bearings in the upper part of the frame is a shaft 45 to the outer end of which is fastened a cylindrical knife 47,

said shaft being rotated at high speed by a belt passing around a pulley 19. In order to sharpen the knife a cup-shaped grinder 51 is carried by a bracket 53 said bracket being fastened to the frame of the machine by a screw 55 which passes through a slot in the bracket and is threaded into the frame, a washer 57 being provided to bridge the slot. After the screw 55 has been loosened the bracket may be adjusted to bring about the desired relation between the grinder and the knife by turning a handle 59 and thereby an upright stud 61 having at its lower end an eccentric pin 63 which is received in a slot in the frame of the machine. The upper end of the shaft of the grinder carries a pulley 65 to receive a belt (not shown) which runs around said pulley, over guide pulleys 67 and down around a groove in the pulley 19. In Order to insure a smooth edge on the knife a bur-remover 69-suitably carried by the bracket 53 may be caused to rest upon the outside edge of the knife during the grinding operation. The grinder 51 may be adjusted vertically andheld in adjusted position by means of knurled thumbholds 72 and 73.

The work is presented to the knife on a work support 7 5 the operative face of which is curved to correspond to the curve of the knife. Normally this work support is stationary in the inclined position indicated by dotted lines in Fig. 1. While it is in that position the work is presented to it as inclicated in Fig. 3, in which the vamp is inclicated at 100 the quarter at 200 and the sur plus material which is to be severed at 300. The clutch is then thrown in with the result that the support is first swung up into approximately the position shown in Fig. 3 and is then moved horizontally toward the knife to cause the surplus material to be severed on a bevel. The mechanism by which this is accomplished will now be described.

The work support has formed on its under side a projection which fits in a clove-tailed slot in a bracket 77, pinch-screws 79 being provided for holding the support in adjusted position. The purpose of this adjustment is to insure the proper sidewise location of the work support so that the distance between the edge of the knife and the support shall be uniform at every locality. The bracket 77 has two segmental ears between which is received the end of a carrier 81, the bracket being pivoted to the carrier at 83 and being held in adjusted angular position by a screw 85 which passes through an arcuate slot in the carrier and is threaded into one of the ears. The carrier 81 is pivoted at 87 to a bar 89 which is slidable in the frame of the machine and is supported on a second slidable bar 91, the latter bar carrying near its forward end. a pin 93 which passes through an obliquely arranged slot 95 in the carrier 81. In order to vary the efiective length of the slot 95 a screw 97 is threaded into the carrier and extends into the slot in such manner that the end of the screw forms in effect one end. of the slot. With this constru cti on it will be clear that, with the parts in the positions shown in Fig. 1, movement of the bar 91 to the right will act first to swing the work support downwardly about the pivot 87 and then to move the work support, and with it the bar 89, to the right. Then these positions have been attained the machine comes to rest as will presently appear and is ready t have work presented to it in the manner described above. Movement of the bar 91 to the left now acts first to swing the work support upwardly about the pivot 87 until the pin 93 contacts with the end of the screw 97 and then to move the work support horizontally to the left into the position shown. In order to insure that the bar 89 shall remain stationary until the carrier has been raised or lowered about the pivot 87, a spring-pressed friction plug 99 (see Fig. mounted in the frame of the machine bears against the bar 89, the amount of friction applied being controlled by an adjusting nut 101.

The movement of the bar 91 is accomplished "by the following mechanism. Referring to Figs. 1 and 8, the bar 91 is provided with a longitudinal recess 103 to receive a boss 105, formed upon the lower end of an uprightarm 107, a headed bolt 109 the reduced end of which is threaded to receive a nut 111 being arranged to engage the arm 107 and clamp the boss in adjusted position in they recess 103. The nut passes through a .slot 113 in the frameof themachine sothat the nut will not interfere with the reciprocation of'the bar 91. The bolt 109 passes through a longitudinal slot in the bar 91 (shown in dotted lines in Fig. 1); and, in order ,topermit adjustment of the bar with respect to the bolt, a screw 115,

which passes through a longitudinalbore in the bar 91 and is held from longitudinal movement with respect to said bar, is threaded into the bolt 109. By adjusting this screw the initial position of the bar 91 may be determined. The arm 107 has formed in it a guideway to receive a square block 117 which is adjusta'bly swiveled on the upper end of the upright arm 119 of a bell crank lever 121 angularly movable about the axis of a rod 125. 'By changing the position of the block 117 on the arm 119, the extent of reciprocation of the bar 91 may be varied. The arm 121 of the bell crank lever is connected by a link 127 with I a crank-pin on a disk 129 fast to the end of the counter-shaft 17.

As the parts of the machine are shown in Fig. 1, the actuating bars 89 and 91 and the wo'r: support 75 are in their extreme left-hand positions, the first half of the reciprocation having been accomplished. The clutch is still in engagement, and the machine will not come to restuntil the parts referred to above have reached their extreme right-hand positions with the work support in its dotted line position. In a'c-' tual operation the work support will probably never be adjusted so that it will occupy the exact position shown in Fig. 1 but will always be inclined more or less at the time the cutting is "being accomplished, for ex ample as shown in Fig. 3.

The work is presented to the worksup port with the thin end of the work support supporting the surplus material and extending close to the line of stitches 131 and-then the treadle is'depressed to cause the work support to be moved first up about the pivot 87 ,then horizontally toward the knifejto cause the knife to seventhe surplus material on a bevel, then downwardly about the pivot 87 and finally horizontally away from the knife, after which the parts of the ma-' chine come to rest in position to receive another piece of work. It is desirable'ito pro brush is carried at.the end ing 'the screw rial firmly downxupon the face of the work support so as to cause itto conform to the curve of said face and consequently to the curve of the edge of the knife. To this end thereis provided a presser133 inthe form of a brush. To provide for adjustment, the of an angularly adjustable arm137 which is held in adjusted position by a pinch-screw 139. This brush,

it will beunderstood, is a narrow one which extends substantially the whole width of the work support. By adjusting the bracket 77 angularly on the carrier 81, the'angle of t-herbevel produced on'the surplus mate'- rial may-bevaried; and toli an ex'tent'the same result may be accomplished by adjust- 97.. By adjusting the bar 91 with respect to the belt 109, the location of the path of reciprocation of the bar 91 may be varied; and by adjusting the swivel block 117 in the guideway in the arm 107 the extent of reciprocation of the barv may be varied. By reason of these adjustments the presentation of the work to the knife may be very nicely controlled. In order to protect the operator from injury a guard 151 '(see Fig. 4) extends around the upper portion of the knife. 1 I V A machine for performing the same operation as is performed by the present machine is shown and described in the application of Bohanan Serial-No. 110,942 which i is assigned to the same assignee-as is the present invention; and broadclaims to features common to the two inventions are contained in the Bohanan application.

Although the invention has been set forth' as embodied in a particular machine, it should be understood that the invention is not limited in the scope-of its application to the particular machineiwhich has been shown and described.

Having thus described my invention, what,

I claim as new and desire. to secure ters Patent of the United'Statesis: I

1. A machine for" removing surplus material projectingbeyond a seam which joins by Let-' two or more Jfiexible article's, having, in

a curved face which serves also as acutting sever' the material;

bed, -andfmeans for causing thejcutter to V A machine for removing surplus m- .teri'al projectingbeyond a seam which joins two or more fiexibleart icleghaving,'in eom bination, a cutter having a curved edge, a support for the surplus material said support having a face curved to correspond to the curve of the cutter, means for pressing upon the material to impart to it the curve of the face of the support, and means for causing the cutter to sever the material.

4:. A machine for removing surplus material projecting beyond a seam which joins two or more flexible articles, having, in combination, a cutter having a curved edge, a support for the surplus material said sup port having a face curved to correspond to the curve of the cutter, means for pressing upon the material to impart to it the curve of the face of the support, and means-for causing relative movement of approach between the cutter and support such that the surplus material is severed on a bevel.

5. A machine for removing surplus material projecting beyond a seam which joins two or more flexible articles, having, in combination, a cutter, a support for the surplus material, means for holding the surplus material against the support, and means for causing the cutter to sever the material on a bevel.

6. A machine for removing surplus material projecting beyond a seam which joins two or more flexible articles, having, in combination, a cutter, a support for the surplus material, yielding means for holding the surplus material against the support, and means for causing the cutter to sever the material. on a bevel.

7. A machine for removing surplus material projecting beyond a seam which joins two or more flexible articles, having, in combination, a cutter, a support for the surplus material, a brush for pressing the surplus material against the support, and means for causing the cutter to sever the material;

8. A machine for removing surplus material projecting beyond a seam which joins two or more flexible articles, having, in combination, a cutter, a support for the sur-.

plus material, means for pressing the surplus material against the support, and means for causing relative movement between the cutter and support to cause the cutter to sever the material.

9. A machine for removing surplus material projecting beyond a seam which joins two or more flexible articles, having, in combination, a cutter, a support for the surplus material, means for pressing the surplus material against the support, and means for causing relative movement of approach between the cutter and support to cause the cutter to sever the material.

10. A machine for removingsurplus material projecting beyond a seam which joins two or more flexible articles, having, in combination, a. cutter, a support for the surplus material, yielding means for pressing the surplus material against the support, and means for causing relative movement between the cutter and support to cause the cutter to sever the material.

11. A machine for removing surplus material projecting beyond a seam which oins two or more flexible articles, having, in combination, a cutting member, a member for supporting the surplus material, two actuators connected to one of said members, one positively and the other loosely, and means for operating the actuators to cause the cutter to sever the material.

12. A machine for removing surplus material projecting beyond a seam which joins two or more flexible articles, having, in combination, a cutting member, a member for supporting the surplus material, two actuators connected to one of said members, one positively and the other loosely, and means for moving one actuator relatively to the other and then moving the actuators in unison to cause the cutter to sever the material.

13. A machine for removing surplus material projecting beyond a seam which oins two or more flexible articles, having, in combination, a cutter, a support for the surplus material, an actuator to which the support is pivoted, a second actuator connected with the support at a point spaced from the pivot, and means for moving said second actuator in a direction to swing the support about the pivot toward the cutter and then to mov the support bodily into operative relation to the cutter.

14. A machine for removing surplus material projecting beyond a seam which joins two or more flexible articles, having, in combination, a cutter, means for operating the cutter, a support for the surplus material, a carrier for the support, a slidable bar to which the carrier is pivoted, a second slidable bar, connections between the. second bar and the carrier such that moving said second bar first rocks the carrier about its pivot and then moves the carrier and the first bar bodily with the second bar, and means for reciprocating said second bar.

15. A machine for removing surplus material projecting beyond a seam which joins two or more flexiblearticlcs, having, in combination, a cutter, means for operating the cutter, a support for the surplus material, a carrier for the support, a slidable bar to which the carrier is pivoted, a second slidable bar, connections between the second bar and the carrier such that moving said second bar first rocks the carrier about its pivot and then moves the carrier and the first bar bodily with the second bar, means for reciprocating the second bar, and means for var inq the location of the ath of retwo or more flexible articles, having, in combination, a cutter, means for operating the cutter, a support for the surplus material, a carrier for the support, a slidable bar to which the carrier is pivoted, a second slidable bar, connections between the second bar and the carrier such that moving said second bar first rocks th carrier about its pivot and then moves the carrier and the first bar bodily with the second bar, means for reciprocating the second bar, and means for varying the extent of reciprocation of said second bar.

17. A machine for removing surplus mabe placed upon the support, and treadle-controlled power-operated means for bringing the cutter and support together to cause the material to be severed and for thereafter restoring their normally spaced relation.

In testimony whereof I have signed my name to this specification.

ALBERT LATHAM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

